Britney Spears seem to have weathered yet another onstage calamity with poise, as it appears the flying apparatus in her Vegas show malfunctioned. Usually, when Britney Spears sings her hit ?Toxic?, she flies over her adoring fans at Planet Hollywood. But during her Jan. 2 performance, the pop singer found herself unable to do much flying and had to keep singing from a platform in a tree on stage.